.More than a dozen students in that school ＿＿＿ abroad to study medicine last year.
| A．sent | B．were sent | C．had sent | D．had been sen t |
—Are you sure the delegation will come to our school next week?
—____________．The head of it has just emailed me about the departure time of their flight．
| A．No wonder | B．Definitely not | C．Don’t mention it | D．You bet |
—Jack, this is the third time that you have been late this week．
—Sorry, sir, but I was_____ for 15 minutes on the way here in the traffic jam．
| A．held up | B．put up | C．taken up | D．given up |
．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 |