There is a small group of English words which even some native speakers and writers find _____.
_____a wonderful sense of humour.
—Do you think we can get there on time?—Yes,_________ the bus does not break down.A.even if .unless C.until D.so long as
It wasn’t ________ they found that there was much trouble ________ the plan.
Every minute should be _________ lessons.
_________ that it's very cruel to kill wild animals for money.