( ) (3)My mother _____ busyA. is B. are C. does
老师早上进教室,同学们应对他说:____。
你怎么跟别人打招呼 ?
如果你想介绍给李明给Jenny认识,你会说:____。
____ is the weather in December ? A.WhatB.When C.How
The boy ____red shorts is the first. A.on B.in C.at