This cake is very sweet．You __________ a lot of sugar in it．
| A．should put | B．could have put | C．might put | D．must have put |
It’s important that he_____ English well.
| A．learn | B．learns | C．learnt | D．learning |
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 |