定语从句专练
1. Carol said the work would be done by October, _____personally I doubt very much.
A. it B. that C. when D. which
2. _______ is mentioned above, the number of the students in senior high school is increasing.
A. Which B. As C. That D. It
3. The fence in our garden, ______ my father built many years ago, has lasted for a long time.
A. that B. which C. what D. where
4. There’s still much ______ can be improved about it.
A. which B. that C. if D. what
5. When lost in work, ____ he often was, he would forget all about eating and sleeping.
A. what B so C. just like D. as