When she saw her son liked reading, she did all she could ______ him.
| A．help | B．to help | C．helping | D．to helping |
It was a time_______ the killer whales helped the whalers catch the baleen whales.
| A．when | B．that | C．then | D．which |
---Which one will I choose?
---Well, you can take _______ of them; I’ll keep none.
| A．both | B．all | C．any | D．either |
---Don’t forget to bring my new books tomorrow afternoon.
-- No, I ________.
| A．don’t | B．can’t | C．won’t | D．couldn’t |
We always keep ____ gas in case we run out.
| A．a great number of | B．plenty of | C．much too | D．a good many |
With no one to ____in such a frightening place ,she felt helpless.
| A．turn to | B．turn in | C．turn off | D．turn over |