If you look in a pond, you... 1... (see) in a shallow water great lumps of jelly. That. ..2... (be) the frog’s spawn. Mother frog... 3... (lay) up to 800 eggs. Don’t think she... 4... (take) care of them. She. ..5..., (leave) them, floating on the surface to look after themselves as soon as the eggs are laid. Then in a few days, if you look at an egg, you...6...(notice) a black spot, at first about the size of a pin head, soon beginning to grow bigger and become shaped like a bean. Then you... 7... (begin) to recognize which is its head and which is its tail. It... 8... (wriggle)
about in the jelly and free itself from it. For a few days, the baby tadpole...9... (hang) about on the jelly. It... 10... (need) no food at this ime; it... 11... (have) not even a mouth yet. But you... 12... (see) soon how it begins to wriggle its tail. Let us look at it in three days. ... 13...it (change)? Yes, it... 14... .It... 15... (begin) to swim around and nibble at the plants. It... 16... (not feed) on jelly any more. The tadpoles... 17... (grow) larger very quickly. At first they... 18... (have) feathery gills on the sides of their heads, but after three weeks the gills... 19...(disappear), Their eyes... 20... (grow) larger, and their color...21...
(become) lighter.What... 22... these signs (tell) you? They. ..23... (tell) you that now, when they are about six weeks old, they... 24... (need) a “meat” diet. When the tadpoles are ready for it, they... 25... (come) close to tiny worms and nibble at them. Soon you... 26... (see) a great change come over the tadpoles. First back legs, then front legs... 27... (grow). They
... 28... (slart) to come to the surface for air, because they...29...
(breathe) now with lungs. The tails... 30... (become) shorter, and after ten to twelve wecks the tadpoles... 31... (turn) into frogs.

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sait14

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you look in a pond, you... 1... (see) in a shallow water great lumps of jelly. That. ..2... (be) the frog’s spawn. Mother frog... 3... (lay) up to 800 eggs. Don’t think she... 4... (take) care of them. She. ..5..., (leave) them, floating on the surface to look after themselves as soon as

the eggs are laid. Then in a few days, if you look at an egg, you...6...(notice) a black spot, at first about the size of a pin head, soon beginning to grow bigger and become shaped like a bean. Then you... 7... (begin) to recognize which is its head and which is its tail. It... 8... (wriggle)

about in the jelly and free itself from it. For a few days, the baby tadpole...9... (hang) about on the jelly. It... 10... (need) no food at this ime; it... 11... (have) not even a mouth yet. But you... 12... (see) soon how it begins to wriggle its tail. Let us look at it in three days. ... 13...it (change)? Yes, it... 14... .It... 15... (begin) to swim around and nibble at the plants. It... 16... (not feed) on jelly any more. The tadpoles... 17... (grow) larger very quickly. At first they... 18... (have) feathery gills on the sides of their heads, but after three weeks the gills... 19...(disappear), Their eyes... 20... (grow) larger, and their color...21...

(become) lighter.What... 22... these signs (tell) you? They. ..23... (tell) you that now, when they are about six weeks old, they... 24... (need) a “meat” diet. When the tadpoles are ready for it, they... 25... (come) close to tiny worms and nibble at them. Soon you... 26... (see) a great change come over the tadpoles. First back legs, then front legs... 27... (grow). They

... 28... (slart) to come to the surface for air, because they...29...

(breathe) now with lungs. The tails... 30... (become) shorter, and after ten to twelve wecks the tadpoles... 31... (turn) into frogs.