It was in the lab __________was in the charge of Professor Smith __________they carried out the experiment.
A. where；that B. which；where C. that；where D. which；that
—Bad luck. My computer doesn’t work.
—Why not turn to John? No one can match him in our class when it __________repairing computers.
A. comes to B. leads to C. contributes to D. attends to
Every year about one million tourists visit Stonehenge, which is believed __________before the Pyramids, about 4,000 years ago.
A. to build B. to have built
C. to be built D. to have been built
__________I don’t like the film, the leading actor’s performance gave me a deep impression.
A. When B. Since C. If D. While
—Will you buy me a new iPod, Dad?
—OK. You __________have one if you promise to take care of it.
A. might B. must C. could D. shall
Jack almost fell off a big tree while climbing it, but managed to __________until help came.
A. put on B. hang on C. turn on D. take on
