When asked about their opinions about the schoolmaster, many teachers would prefer tosee him step aside ________ younger men.[ ]

.The new building is_________to be completed before the end of this year.

Do you have anything to say for yourselves?—-Yes, there is one point______ we must insist on.

Water can absorb and give off a lot of heat without big changes in temperature, thus creating a _____ environment. [ ]

We never know we will succeed ________ we actually try.