(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：

(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.

A. Study                   B. To study               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

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