—What a pleasant surprise to see you here! I       you          Shanghai.—Me too. But I         there next Saturday.
#40443
A
think; have gone to; am going
B
thought; had gone to; will go
C
thought; had been to; would go
D
think; have been to; am going
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Do you know when the basketball_________?
#37140
A
is invented
B
was invented
C
has invented
D
had invented
– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.
#39701
A
polluted, must do
B
had polluted , must be doing
C
have polluted , must be done
D
were polluting, must be done