However, at times this balance in nature is disturbed, ____ a number of possibly unforeseen effects.

I ______ the headmaster would say something about his school report, but he didn’t mention it.

We do not have enough money.________，we cannot afford to buy the new car

Beijing is one of the ____ in the worldtoday.

The dress is very nice, but not ______ the girl’s taste, for she is somehow particular