t my glasses, I couldn’t _____ whether thatfigure on the blackboard was a three or an eight.

The man refused to say sorry to me, ____ it was his mistakes(错误).

The stable political and economical situation is considered ____ to the growth of town enterprises.

Why didn’t you apologize to her —She drove away ______ I could say a word

People have ____too many trees to make desks, chairs, chopsticks and so on.