(2013·重庆模拟)—When did your brother begin to show his interest in medicine? —It was a Saturday　　　he noticed his classmate experimenting on a frog in the lab.

Nowadays more and more people are advised to arrange for insurance_____that they or their family members need medical treatment

A beekeeper has a to motivate the bees by leaving some honey in the hive—not so much in case that the bees stop working.

suggested our going on an outing to thecountryside next weekend, but the rest didn’t sound very _________ about theidea

We’d better go downstairs right now forlunch.—__________ They serve food 24 hours a day.