The higher you go, the more difficult it ___________ to breathing.
a) Is becoming
b) Has becoming
c) Became
d) Becomes
In the pirate story, there were the good guys against the buccaneers.
in this sentence, the word buccaneers means____________?
a) Actors
b) Helpers
c) Students
d) Pirates
He __________ sing high notes when he was young but his voice has changed.
a) Ought to
b) Would
c) Could
d) Should
Vertical columns in the periodic table are called:
a) Rows
b) Periods
c) Groups
d) Blocks
30% = _____________?
a) 0.3
b) 0.03
c) 30
d) 0.003
