单选题 The child _ parents are talking with the teacher is playing with his new toy.

单选题 The hotel can __ 600 guests.

单选题 I _ down the name of the book that he was talking about.

单选题 Sorry, we don't have any double room __ since it is peak season now.

单选题 The issue ___ at the meeting now is very serious.

单选题 The tall building _ last month will be our new classroom building.

单选题 Mr. Johnson, I am calling to __ the rooms you reserved for tomorrow.

单选题 I can never forget the days __ my family and I spent together in travelling.