What ______ public is concerned about is whether medical workers and scientists will be able to find for this new disease in a short time.
| A．不填;不填 | B．不填;the | C．the;不填 | D．the;a |
Peter’ shirt looked just the same as Tom’s，but it cost ______ his．
| A．as much twice as |
| B．twice as much as |
| C．much as twice as |
| D．as twice much as |
We can’t figure out ______ quite a number of insects and birds are dying out．
| A．that | B．as | C．why | D．when |
______ environmental damage is done，it takes many years for the ecosystem to recover．
| A．Even if | B．If only |
| C．As if | D．Once |
Spending a few hours learning about the history and culture of the destination will help tourists understand they're seeing
| A．what | B．where |
| C．that | D．why |
—Sarah went to the party．
—Really? I her if I had gone with you．
| A．met | B．had met |
| C．would met | D．would have met |