Do not let any failures discourage you, for you can never tell ________ close you may be to victory.
| A．how | B．that |
| C．which | D．where |
I’m sorry that I can’t help _____ trees because I am busy with the homework.
| A．to plant | B．planting | C．planted | D．plants |
—What led to his success ?
—He succeed _____ working hard .
| A．to | B．in | C．through | D．by |
.I don’t think that the sentence need ______again.
| A．explaining | B．be explained | C．to be explained | D．explaination |
—Of the two apples , which one do you prefer ?
—________ bigger one . It’s_____most delicious one , I think .
| A．The,a | B．A,/ | C．The, the | D．A, the |
Though ___ to stop to take a rest, the workers went on working till sunset.
| A．told | B．being told | C．telling | D．having told |