He was unable to make much progress,_________.
A hard as he tried B as hard he tried C hard he was tried D tried hard as he
The reason_____the manager explained at the meeting sounds reasonable.
| A．which | B．what | C．why | D．for which |
I like to go shopping at the weekdays,_____the shop isn’t crowded.
| A．which | B．when | C．that | D．where |
The Science Museum,_____we visited during a recent trip to Britain, is one of London’s touristattractions.
| A．which | B．what | C．that | D．where |
The expert offered us another piece of advice,_____of great help to our program.
| A．I think it is |
| B．I think which is |
| C．which I think it is |
| D．which I think is |
— Where is John? — He _____ in the library.
| A．should be | B．must be | C．can be | D．must have been |