The time and effort he has devoted during the past few years____ trees in that remote area is now considered to be of great value.
Could you give me a hand?It seems that my strength has .
Had I been a little more careful,I such a foolish mistake.
English is _____as Chinese.
________ we don’t care about ourselves, we don’t want our kids to live in a bad environment.
It was in the lab ________I worked________they did the experiment.