. --So hard __________ in the past few months that he has made great progress in English.
--I can see that, only a few mistakes he made in this exam.
| A．he worked | B．did he work |
| C．he has worked | D．has he worked |
14.Teachers _____ their knowledge to their students .
| A．pass by | B．pass to | C．pass over | D．pass on |
13.Rainforests _____ and burned at such a speed that they will disappear from the earth in the future.
| A．cut | B．are cut | C．are being cut | D．had been cut |
12.He got well –prepared for the job interview, for he couldn’t risk _____ the good opportunity.
| A．to lose | B．losing | C．to be lost | D．being lost |
11.Your sister has grown up. She is no longer ___ she was five years ago when I first saw her.
| A．what | B．who | C．that | D．whom |
10.That year his total income, with his reward ______, _______ 1500 dollars.
| A．added up to; added | B．added; added to |
| C．added to; added up to | D．adds; adds up to |