If human beings had been a bit less greedy and cruel, more birds and animals _____dying out.
| A．ought to avoid | B．could have been avoided |
| C．should have avoided | D．might have avoided |
Curious about the world around him, my son____ask me endless questions when he was young．
| A．could | B．might | C．should | D．would |
—Hangzhou, which we visited last week is quite beautiful．
—We should thank Tom．He ____ us to．
| A．had persuaded | B．persuaded | C．was persuading | D．persuades |
It is said that he’s looking for a new job, one ____he can get more money to support his family．
| A．when | B．where | C．that | D．which |
— I'm wondering why the visitors chose to stay with the host fa
mily．
— _____ the real local life．
| A．Experience | B．Experiencing |
| C．Having experienced | D．To experience |
—I’d like to buy the kind of cloth which ____ easily．
—Will this one ____?
| A．washes; work | B．is washed; work |
| C．washes; do | D．is washed; do |