꼭 풀어야 하는 문제인데 해설지에 답이 없어서 질문드려요.
가능하면 간단한 설명도 부탁드립니다.
1. Even after your explanation, we still have _____ of questions.
① a few ② some ③ quite a few ④ a number
2. Some teachers argue that students who _____ using a calculator may forget how to do mental calculation.
① used to ② are used to ③ are about to ④ cannot but
3. One other drawback, _____, is a landscape barren of restaurants.
① hardly is a killer ② though hardly is it a killer ③ though a killer is hardly ④ though hardly a killer
4. Each word in our mental dictionaries _____ with its unique sound and meaning.
① must store ② must be stored ③ must is stored ④ must to be stored