Could I use your bike?— Yes, surely you ______. [ ]

fore there goes the bell for class,our math teacher took out a piece of andwrote his problems on the blackboard.

Greenlandis _______ huge island that is mostly covered with_______ thick ice sheet

We’d better__________when he is thinking，as he prefers to solve problems on his own.

What did Lisa say to you just now，Amy 一She asked me .