A．workB．regardC．serveD．signify
A. work
B. regard
C. serve
D. signify
A．yetB．butC．andD．so
A. yet
B. but
C. and
D. so
A．chanceB．purposeC．opportunityD．basis
A. chance
B. purpose
C. opportunity
D. basis
Researchers think that it is______.
A. safe to eat fresh fish
B. dangerous to get close to the algae
C. safe to be near the algae
D. dangerous to expose the algae
微信支付 
支付宝支付