【单选题】
All the flights _____because of the snowstorm, we had to take the train instead.
①
were canceled
②
had been canceled
③
having canceled
④
having been canceled
【单选题】
It is a huge task to ______ all the rooms in the building in such a short time.
①
go ahead with
②
keep up
③
clean up
④
work out
【单选题】
_______ the bad storm Tom delivered the newspapers on time.
①
In favor of
②
In spite of
③
In front of
④
In charge of
【单选题】
It was not until he arrived in class _____ realized he had forgotten his book.
①
when he
②
that he
③
and he
④
he
【单选题】
First please be ( ) during your travel，otherwise we will waste time.
①
on time
②
in time
③
at the time
④
by the time
【单选题】
What role does a teacher play in the following activity? When students are doing a group-work task, the teacher joins one or two groups for a short period of time.
①
Controller
②
Assessor
③
participant
④
Resource-provider.
【单选题】
____ find out what had happened.
①
Not until he woke up did he
②
Not until he woke up he
③
Until he woke up did he
④
Until he woke up he