A good many proposals were raised by the delegates,_______wa

A good many proposals were raised by the delegates,_______was to be expected.
A)that B) what C) so D) as
He was such a _____ speaker that he held our attention every minutes of the three-hour lecture.
A)specific B) dynamic C) heroic D) diplomatic
The opening between the rocks was very narrow ,but the boys managed to______through.
A)press B) squeeze C) stretch D) leap
They are trying to ______ the waste discharged by the factory for profit.
A)expose B) exhaust C) exhibit D) exploit
The manager urged his staff not to ___ the splendid opportunity.
A)drop B) miss C) escape D) slide