问题

Has MrBlack decided not to take part in the party? —YesBut the reason______he refused the invitation is not clear

A:what
B:for which
C:with what
D:which

正确答案是：

同类题型

There is a new problem involved in the popularity of private cars __________ road conditions require __________.

Spend more time talking with your parents， ______ they may not understand you.

the heavy rain, we ______the town

“Where have you been” — “I got caught in traffic; otherwise_____ sooner”

How do you like the blue T-shirt—OK, but do you have a ______one in blue I can’tafford the price.