用方框内所给短语的适当形式填空。 be useful for, be devel

问题填空题

用方框内所给短语的适当形式填空。

be useful for, be developed in, come true, spend on, be made of

1.一How long have you ________ your lessons so far?
   一About an hour.
2. I think that MP4 ________ learning English well.
3. 一What a special bridge it is!
    一Yes, It ________ lots of huge stones.
4. 一What's that?
    一An English Learning Machine. It ________ Peking University last year.
5. Your dream ________ if you continue to work hard.

答案

1. spent on 2. is useful for 3. is made of 4. was developed in 5. will come true