3.The boy stood there without ___(dare)___(say) a word
4.She promised ___(come) but she failed ___(do) so
5.It's no good ___(pretend)___(know)what you don't know
6.Madame Curie devoted all her time to ___(work) hard for 4 years,and she succeeded in ___(diacover) Radium
7.It's difficult for a foreigner to get used to ___(eat) with computer
8.Mary tried ____(explain） but the teacher refused ___(listen)
9.Would you mind ___(show) me how __(operate) the computer
10.People used ___(make) fire by ___(rub) two sticks together
11.We'd better ___(take) an umbrella .We don't want ___(rish)___(get)caught in the rain
12.Do you feel like ___(go) shopping or would you rather ___(stay) at hime
13.The teacher had me __(repeat) his words ___(make) sure that i understod what __(do) next
14.If you can't turn the key ,try ___9put) some oil in the lock
15.They managed ___(drive) the snake out by ___(let) the sun ___(heat) the sleeping bag
16.___(get) enough money ___(support) her family,she spent the summer and fall ___(hunt) for a job
17.It's no use ___(try)___(interrupt) him.You'll have ___(wait) until he stops ___(talk)
18.It's better ___(ask) the teacher for help than___(stand) here ___(quarrel)with each other
19.Imagine ___(travel) in outer space .We are unable ___(stay) in one place.___(drink) and ___(eat) ecome very difficult
20.I remember ___(tell) the news before