---Shall we visit the Shanghai World Expo ______ second time in the vacation?
---Good idea. Some pavilions didn’t open ______ first time we went there.
| A．the; the | B．a; the | C．不填; the | D．a; a |
The doctor’s treatment has worked marvels: the patient has completely．
| A．repeated | B．returned | C．recovered | D．reminded |
—You ought to have made an apology to Tom yesterday evening．
—Yes, I know I ____．
| A．ought to have | B．have to | C．should | D．must have |
The government officials met the workers and engineers working on the stadium, most____ were migrant workers．
| A．of which | B．of who | C．of whom | D．of them |
—Why are you so late?
—The driver couldn’t see clearly because of the fog．____, the road was too icy．
| A．Therefore | B．Otherwise | C．However | D．Besides |
With your brother’s help, I’ve made great progress in English and I really want to do something for him ____．
| A．in turn | B．by turns | C．in return | D．in answer |