---What do you think of the film?
---Cool! Never before _____ a better one.
| A．had I seen | B．I have seen | C．have I seen | D．I had seen |
We lost our way in that small village, otherwise we ________more places of interest yesterday.
| A．visited | B．had visited |
| C．would visit | D．would have visited |
Had it been possible I would have gone to the movies, but I ________________ busy.
| A．had been | B．am | C．was | D．would be |
In some developed countries, larger population is ______________ in their big cities.
| A．approved | B．gathered | C．concentrated | D．fixed |
Accurately, my granny has got no hobbies at all ______ you think watching TV as one.
| A．if | B．while | C．after | D．unless |
A person ________ with H7N9 viruses will be more likely to die of lung dysfunction.
| A．developed | B．infected | C．injected | D．progressed |