Nobody knows what the   of the explosion was reaction r
A.reaction
B.reason
C.cause
D.source

She gave him a   wallet on his birthday  small leather
A.small leather brown
B.small brown leather
C.brown small leather
D.leather small brown

Its cold outside   your coat Put down Put off Put on Pu
A.Put down
B.Put off
C.Put on
D.Put into

The facsimile   by Alexander Bain in 1843 was invented
A.was invented
B.has invented
C.has been invented
D.invented

We dont allow you   in our house to smoke is smoking sm
A.to smoke
B.is smoking
C.smoke
D.smoked

The flight to Hanoi was delayed for twenty minutes   th
A.because
B.in spite of
C.because of
D.although

When I went out the sun   brightly is shining shone was
A.is shining
B.shone
C.was shining
D.shines

She tries always to finish her homework before going to
A.before
B.her
C.tries always
D.going to bed

She tries always to finish her homework before going to
A.before
B.her
C.tries always
D.going to bed

They were waiting nervous in the waiting room for the i
A.waiting room
B.nervous
C.for
D.were