问题

Sam is doing some _______ about the ancient Silk Road.

A:exercise
B:operations
C:research
D:experiments;

正确答案是：

同类题型

Would you like something to____— Yes, please. A story- book.

_________! Where is my jacket—_________, I don’t know.

Learning to care for a pet helps a child grow into an adult who feels responsible for ____dependent on him.

Wu Yishu, _____16-year-old girl, won ________ first place in the CCTV Chinese Poetry Conference（中国诗词大会）.

Only after my friend told me _____ . [ ]