【单选题】
_______every week for several hours is good to keep healthy.
①
Exercise
②
To exercise
③
Should exercise
【单选题】
_____all the representatives still not there,the meeting was postponed for several hours.
①
Because
②
With
③
By
④
Without
【单选题】
The boy was seen ______ the piano at 9 yesterday evening.
①
to play
②
play
③
playing
④
played
【单选题】
Which of the following is the time when students work as a whole class?
①
When all the students are under the control of the teacher
②
When students work in pairs on an exercise or a task
③
When students work in small groups
④
When students are expected to work on their own at their own speed.
【单选题】
The engineers in this lab spent several weeks _______ their plans for the new bicycle.
①
counting
②
stripping
③
elaborating
④
casting
【单选题】
The [] was seen strolling with his kids in the park at dusk yesterday.
①
elect president
②
president elect
【单选题】
She was often seen _________ shoes for others at a shoe stand.
①
to clean
②
cleaning
③
clean
④
to cleaned