问题
If a thing is worth ______, it must be well ______.
A:doing; done
B:to do; doing
C:to do; done
D:being done; doing
B:to do; doing
C:to do; done
D:being done; doing
正确答案是：
同类题型
The road is covered with snow. I can’t understand _____ they want to go to school by motorbike.
_________ now to protect the environment, we’lllive to regret it.
____________ students have more spare time for theirhobbies now.
My sister has a habit of keeping a diary and writes down ______ happens every day