（十八）
1. You'd better 2. used to 3. are looking forward to 4. as soon as I finish reading 5. won't be closed until （十九）
1. hold on 2. by accident 3. What 4. educational/ instructive 5. Whatever (二十)
1. what the song can remind him of
2. Is the boy old enough to search information alone 3. wasn't famous until he won the award 4. Thanks to your help; looks much tidier 5. has no choice but to be strict with 6. dangerous it is to drive after drinking （二十一）
1. looking after/taking care of/caring for/watching 2. dances to 3. didn't leave the park until 4. used to living 5. the liveliest places 2020-2-8
