The energy from the sun and wind is very cheap and will never ________．（ ）
| A． |
run out |
B． |
cut out |
C． |
come out |
D． |
give out |
His guitar ________ as a gift for him last week.
| A． |
buys |
B． |
is bought |
C． |
bought |
D． |
was bought |
_________ a fresh spring morning it is!
| A． |
Who |
B． |
Why |
C． |
What |
D． |
How |
Mr. Brown told his son not ________ the paintings in the museum.
| A． |
touch |
B． |
to touch |
C． |
touching |
D． |
touched |
They have been friends ________ they first met.
| A． |
since |
B． |
while |
C． |
before |
D． |
after |
— Excuse me, what is Nick doing?
— Look! He ________ flowers outside.
| A． |
waters |
B． |
watered |
C． |
is watering |
D． |
has watered |