I failed in the final examination last term and only then_____the importance of studies.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
32．—You are so strong．
—Yes，I often________in the gym．
| A．help out | B．work out | C．make out | D．turn out |
31．—Bad luck! I have left my dictionary at the dormitory．
—__________．
| A．Here is it | B．Here are you | C．Here it is | D．Here you are |
30．The extra room________very useful when we had visitors．
| A．had been proved | B．was proved |
| C．had proved | D．Proved |
29．Don’t touch anything．Better leave things_________they are until the police arrive．
| A．before | B．that | C．as | D．While |
28．You can ask him again if you like，but it won’t make any __________he will still say no．
| A．point | B．use | C．result | D．Difference |