--- An explosionata coal mine killed at least62workersandleftanother13 missing.
--- Yes,   news came as shock tous all.

A．the;the

B．/; /

C．/;a

D．the;a

Sustainable development is long-term ________which focuses on the environment and  ________ natural resources.

A．plan; preserve	B．plan; preserving
C．planning; preserving	D．planning ;preserve

It’s the same in China --- many people, ________ some are not overweight at all, are always going on diets or taking weight-loss pills, ________ are often dangerous.

A．whose; which

B．of which; who

C．of whom; which

D．who; that

A giant helium（氦） balloon is telling residents of Paris how good or bad the air quality is．When it’s good, the balloon ----measuring 22 meters wide and 32 meters high---shines green．_________, it’s red．

A．Though terrible	B．Whenever good
C．If worse	D．When bad