I walked slowly through the market, where people all kinds of fruits and vegetables. I studied the prices carefully and bought what I needed.
| A．sell | B．were selling | C．had sold | D．have sold |
We are seeking a prime minister, _____ who will devote himself to the interest of the country.
| A．he | B．him | C．that | D．one |
Due to the policy of free highway fees on major holidays, too many passenger cars are trapped on the highways, causing heavy traffic jams, some even _______ for several hours.
| A．held up | B．broken up | C．taken up | D．given up |
Engineering is ______ challenging course of study that requires ______ thoroughunderstanding of mathematics and science.
| A．the; a | B．a; the | C．不填；不填 | D．a; a |
Vincent is a(an) .He likes travelling to the places where there are few people.
| A．writer | B．explorer | C．worker | D．teacher |
Look ,the apartment that isthere belongs to us.
| A．built | B．build | C．being built | D．being build |