词汇运用 （10分）
A.根据句意和中文提示写出恰当的单词，每空一词。（5分）
小题1:Protecting the ________________(环境) is our duty.
小题2:Leo couldn’t stop __________________(思念) his parents when studying abroad.
小题3:My mother took me to school when I was at ________________(小学) school.
小题4:The cake is ______________(可口的)，I like it.
小题5: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（5分）
小题6:We ______________________(not see) each other since last week.
小题7:The roller coaster moved at high speed and was very _____________(excite).
小题8:We _______________(wait)for the bus when a traffic accident happened.
小题9:_______________(be) pollution a serious problem then?
小题10:All of us went on a school trip to South Hill except ____________(he) last week.
