Some people fear that ________ air pollution may bring about changes in _______ weather around the world.()
/; the
the; /
an; the
the; a
We can’t go on with the experiment because the computer_________.
The two sides have finally___________, though some small differences still exist.
The harder you work,____________.
--Do you like the material? --Yes, it ___________ very soft.
--Where is Xiao Wang? --I don't know. He__________ be in the library.