用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

The old man enjoys ________(grow) flowers.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

Bob studied very hard and at last he ________(catch) up with other classmates.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

Mary is always ready ________(help) her friends.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

How long have you ________(keep) this book?

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

It's so cloudy. I think it ________(rain) tonight.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

I ________(feel) angry when I heard this.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

My mother is busy ________(prepare) food for supper.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

I ________(begin)to learn French ten years ago.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

-- What's the little girl doing?

-- She ________(put) up a picture on the wall.

用括號中所給詞的正確形式填空，使各句意思通順、語法正確。

The boy ________(know)that his mother would punish him so he dared not go home.