第一部分：单项选择（共20小题；每小题1.5分，满分30分）
1．– I’d like to have one more look around. By myself this time.
-- __________.
A. There you go B. Be my guest
C. Count me out D. Drop me a line
2．– Where are my new sneakers? Have you seen them?
-- How __________ I know? I’m your sister, not your servant.
A. shall B. should C. will D. might
3．Market economy is a competitive economy, _________ I think, suppliers, producers and dealers should obey market rules and develop cooperative relation based on mutual benefits.
A. that B. which C. where D. how
