Myformerclassteacheraskedmetog-优题课

Without his support, we wouldn't be _________ we are now.

how

when

where

why

Ordinary soap, _________ correctly, can deal with bacteria effectively.

used

to use

using

use

A rescue worker risked his life saving two tourists who _________ in the mountains for two days.

are trapping

have been trapped

were trapping

had been trapped

In any unsafe situation, simply _________ the button and a highly-trained agent will get you the help you need.

press

to press

pressing

pressed

China's high-speed railways _________ from 9,000 to 25,000 kilometers in the past few years.

are growing

have grown

will grow

had grown