单项选择题
I've been waiting for him for ______ hour and ______ ha...
单项选择题I've been waiting for him for ______ hour and ______ half.
She forgot to tell me which bus to ______.A．travelB．tak...
单项选择题She forgot to tell me which bus to ______.
There is nobody in the office ______ thereA．isn'tB．aren...
单项选择题There is nobody in the office ______ there
