No more than 15 scientists __________ the South Pole till now.
A.visited B.had visited C.have visited D.visit
More than one passenger ________ injured in the air crash.
A.were B.is C.are D.was
His silence at the meeting suggested that he ____ to your plan.
A.didn’t agree B.hadn’t agreed C.wouldn’t agree D.shouldn’t agree
It was his long absence from work without permission________ delayed his promotion.
A.which B.that C.why D.who
It’s no use _________ without thinking.
A.learn B.to learn C.having learned D.learning
Successful businesses highly adapt themselves _________ economic changes.
A.from B.to C.for D.over
