一、单项选择（共25小题；每小题1分，满分25分）
1. _________baby panda is much shorter than __________adult panda.
A. A, an B. A, a C. An, an D. An, a
2. When the storm stopped, they __________for the bus at the bus stop.
A. waited B. were waiting C. are wa iting D. will wait
3. At 9 yesterday morning, I _________an English class while they ___________P.E.
A. was having, were having B. had, had C. was having, had D. had, were having
4. It’s strange _________Mary _________such a decision.
A. for, making B. for, to make C. of, made D. of, to make
