What nice day! Let's go for a picnic．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
Wow! The school uniforms can tell parents_______!
Cool! So the children won't get lost easily．（ ）
| A． |
where are their children |
| B． |
where their children are |
| C． |
what do their children study |
| D． |
what their children study |
Nobody can hear you______ you speak in a louder voice．（ ）
| A． |
unless |
B． |
if |
C． |
when |
D． |
after |
Boys and girls， you should look after________when your parents are not at home．（ ）
| A． |
himself |
B． |
herself |
C． |
yourselves |
D． |
themselves |
Another bridge over the Jialing River__________last year．（ ）
| A． |
builds |
B． |
built |
C． |
is built |
D． |
was built |