Our monitor is the first person we can think of ________, for he is always willing to help ________ is in trouble.
.It is _______ that he has been addicted to the drugs and has difficulty quitting it.
Pudong Developmental Zone is no longer ________ it used to be.
George Washington was born in 1732 in a rich family in _______ is now the state of Virginia.
Every possible means _______to prevent the air pollution, but the sky is still not clear.
He’s _______ to fail the exam if he doesn’t do any revision.