1．(2018·全国卷Ⅱ)It is more likely that none of us start a conversation because it's awkward and ________(challenge)．
[答案] challenging
2．(2018·全国卷Ⅱ)I saw there were two ________(instruct) on board and a man lying across the middle.
[答案] instructors
3．(2018·全国卷Ⅲ)We both became ________(absorb) in the simplicity of playing together.
[答案] absorbed
4．(2018·天津卷)Being the coach of the new team, I was excited because I knew we were going to win, but to my disappointment we ____________(defeat)．
[答案] were defeated
