She can't help ______ the house because she's busy making a cake.
| A．to clean | B．cleaning | C．cleaned | D．being cleaned |
19．He says he really can’t _____ to wait another day．
| A．waste | B．afford | C．spare | D．Pay |
18．---I can’t recite the poem．
---Well, you are supposed _____ it many times yesterday evening．
| A．to read | B．to have read | C．reading | D．having read |
17．---May I surf the Internet tonight?
--- No, you ______．You must do the exercises．
| A．needn’t | B．won’t | C．mustn’t | D．don’t |
16．Julia _____ with a stranger when Jim went to the jacket he _____ in the restaurant．
| A．had quarreled; left | B．had quarreled; had left |
| C．was quarreling; has left | D．was quarreling; had left |
15．South of the lake _____ two famous universities．
| A．have | B．has | C．are | D．Is |