题目内容
句意填空，首字母已给出
You should be very careful if you use c________ cards to buy things on-line.
Where were you b________ 4∶00 and 6∶00 yesterday afternoon?
—Mum, will you please a________ me to take part in that party?
—OK, dear.
There are four o________ on the earth.
根据句意填空，首字母已给出
They c________ to the police about the noise from the bar.
