The police _________ the mountain to ________ the murderer.
| A．is searching; search for |
| B．are searching for; search |
| C．is searching for; search |
| D．are searching; search for |
Flight BA 123 to Vienna is now boarding at
| A．Gate 21 | B．21St Gate | C．the Gate 21 | D．21 Gate |
He didn’t seem to mind_____________ TV while he was trying to study
| A．them to watch | B．that they watch |
| C．their watching | D．watching |
I don't skate now, but I___________ when I was a kid.
| A．used to | B．am used to it | C．sued | D．used to do |
. We liked the oil painting better____________ we looked at it.
| A．as | B．while | C．the | D．the more |
If human beings had been a bit less greedy and cruel, more birds and animals dying out.
| A．ought to avoid | B．could have been avoided |
| C．should have avoided | D．might have avoided |