词汇运用
A.根据句意和中文提示写出恰当的单词，每空一词。
Protecting the ________________(环境) is our duty.
Leo couldn’t stop __________________(思念) his parents when studying abroad.
My mother took me to school when I was at ________________(小学) school.
The cake is ______________(可口的)，I like it.
Why not take a ___________(直达的) flight to Sydney? It is much faster.
B.根据句意, 用括号中所给单词的适当形式填空
We ______________________(not see) each other since last week.
The roller coaster moved at high speed and was very _____________(excite).
We _______________(wait)for the bus when a traffic accident happened.
_______________(be) pollution a serious problem then?
All of us went on a school trip to South Hill except ____________(he) last week.