(11)______ until the lights have turned to green.
A. Wait B. To wait
C. Waiting D. Having waited
(12) ______ the pieces of cloth with a loose stitch before finally sewing them together.
A. Join B. To join
C. Joining D. Joined
以下各题也应选A，因为填空句为祈使句(from www.hxen.com)：
(13) I don’t want to listen a long story — just _____ me the result.
A. tell B. telling
C. to tell D. to be telling
(14) Why stand there watching — _____ and help us!
A. come B. coming
C. to come D. to be coming
(15) Don’t waste your money on silly things — ______ it.
A. save B. to save
C. saving D. having saved
(16) First ______ the rice by washing it, then ______ it in boiling water.
A. prepare, cook B. preparing, cooking
C. preparing, cook D. prepare, cooking
(17) To test eggs, _____ them in a bowl of water: if they float they’re bad, if they sink they’re good.
A. put B. putting
C. to put D. to be putting
但是请注意，类似下面这样的题目情形有所不同，所填部分为目的状语（用不定式，即答案选B）：
(18) ______ French well, she went to France to live with his cousins.
C. studying D. Having studied
(19) _____ late in the morning, Mr. Smith turned off the alarm.
A. Sleep B. To sleep
C. Sleeping D. Having slept
(20) ______ the flies out, we had to shut all the doors and windows.
A. Keep B. To keep
C. Keeping D. Having kept
(21) ______ their service, the workers of the hotel are active in learning English.
A. Improving B. To improve
C. Improve D. Having improved