帮忙,请高手帮我做做这几道英语题!谢谢

帮忙,请高手帮我做做这几道英语题!谢谢
1:Our director had______on the matter for a long time before he made the decision.
A)hushed B)thrashed C)ponderde D)suspended
2:The plants are in a(n)______plastic box,so the children can observe how the roots grow with time.
A)appropriate B)intricate C)transparent D)waterproof
3:The Unitde Nations was supposed to_____the role of global peace-keeper.
A)contend B)nurture C)carve D)undertake
4:People under a lot of______may experience headaches,minor pains and sleeping difficulties.
A)stress B)exposure C)endurance D)endeavor
5:The number 30 on a road sign_____that the speed limit is 30 miles an hour.
A)signifies B)forecasts C)illumines D)characterizes
6:The weather wasn't favorable and both teams had to_____icy tain and a strong wind during the match.
A)pin down B)contend with C)get stuck in D)take control of
7:The car, at least as we know it,is on the way out,because its exhaust_____a threat to the environment.
A)originates B)posesC)offends D)paralyzes
8:I will hold you personally_____if anything goes wrong in this project.
A)destructive B)lucrative C)diverse D)responsible
9:We must get the trapped victims out at once because the building is in_____danger of an explosion.
A)opaque B)vivid C)mute D)imminent
10:After Mike left for work,I_____the beds and vacuumed the carpets.
A)patted B)clapped C)stripped D)shaved