问题

People are puzzled _____ they read the book.

A:the first time
B:at the first time
C:for the first time
D:at first

正确答案是：

同类题型

_________________—Not bad.

od ran out early, but __________ the party was asuccess according to the guests present that evening

This is a photo ______my family.

The boy was caught in the heavy rain last night and.

In order to keep fit, he chooses vegetables and fruit in ____to any kind of meat.