A.delay
B.inaction
C.standstill
D.gridlock

A.a bug
B.a bee
C.a bull
D.an ant

A.tuition
B.debt
C.livelihood
D.finance

A.protected
B.held
C.assured
D.defended

A.take up
B.turn round
C.put off
D.do with

A.produce
B.productive
C.production
D.productively

A.Having invited
B.To have invited
C.Having been invited
D.To have been invited

A.Before she came to London
B.By the time she comes to London
C.While she was in London
D.After she came to London

A.Although
B.Despite
C.Because
D.Because of

A.seriously
B.insignificantly
C.largely
D.commonly