Another driver had just driven into the back of Jack's car ______ he was waiting at some traffic lights.
| A．since | B．once | C．while | D．during |
—How did you find the talk this morning?
—______.
| A．By asking my students | B．It was easy to find |
| C．Very disappointing | D．Just in time for it |
．The flowers _________sweet in the botanic garden attract the visitors to the beauty of nature．
| A．to smell | B．smelling | C．smelt | D．to be smelt |
．--- I will attend your lecture at 10:00 tomorrow.
--- I am sorry, by then my lecture will have ended and I ______ my guests in my office.
| A．is being met | B．will meet | C．will be meeting | D．will have met |
．He looked around and caught a man ________his hand into the pocket of a passenger．
| A．put | B．to be putting | C．to put | D．putting |
．The party, which had been greatly _____, was spoiled by the rude behavior of an uninvited guest.
| A．looked forward to | B．looked up to |
| C．look into | D．called for |