下列是某化学兴趣小组对该次活动设计的4个实验方案，其中方案一、方案二都合理的是
A．A
B．B
C．C
D．D
答案：D
With _______ successful launch of Tiangong-1, which was _______ breakthrough in this
field, China's space dream took a step closer to reality.[ ]
A. the; a
B. a; /
C. a; the
D. the; /,
— When did your uncle arrive_______ China?
— He got to Guangzhou ________ the morning of the 16th of May.
A．at; in
B．in; in
C．in; on
D．in; at
