1．(2018·全国卷Ⅱ)It does point out that many parents still limit electronic reading, mainly due to ________(concern) about increased screen time.
[答案] concerns
2．(2018·全国卷Ⅲ)The city was crowded with disappointed people with no interest in ________(settle) down.
[答案] settling
3．(2018·江苏卷)It can be concluded that restaurant keepers need not “be overly ________(concern) about ‘bad tables’” given that they are profitable.
[答案] concerned
4．(2017·全国卷Ⅰ)Our café offers a complete menu of lunch and snack options, in ________(add) to seasonal specials.
[答案] addition
