．The day before yesterday John was dismissed because of his _____ attitude towards his job．
A．informal B．casual C．determined D．earnest
—Did you tell Jimmy that we’ve put off the meeting?
—No．He rushed out _____ I could say anything．
A．in case B．after C．before D．unless
．—______ I lock the lab before I go home?
—Don’t bother．I’ll check it myself later．
A．May B．Must C．Can D．Shall
．Interestingly in some parts of the world, women are expected to earn money _____ men work at home and raise their children．
A．but B．though C．because D．while
Leaders of many countries have been trying to _____ what it is that makes China develop so fast in recent years．
A．carry out B．figure out C．watch out D．make out
I’m not sure whether I will have anything else to do this evening．_____, I will try every possible means to come to your birthday party．
A．Even though B．If so C．Anyhow D．Instead
