________ two exams to worry about, I have to work really hard this weekend．

A．With

B．Besides

C．As for

D．Because of

He got well-prepared for the job interview, for he couldn’t risk ________ the opportunity．

A．to lose

B．losing

C．to be lost

D．being lost

________ and happy, Tony stood up and accepted the prize．

A．Surprising

B．Surprised

C．Being surprised

D．To be surprised

I couldn’t do my homework with all that noise ________．

A．going on

B．goes on

C．went on

D．to go on

The missing boy was last seen ________ near the river．

A．playing

B．to be playing

C．play

D．to play

－The light in the office is still on．

－Oh，I forgot ________．

A．turning it off

B．turn it off

C．to turn it off

D．having turned it off

She reached the top of the hill and stopped ________ on a big rock by the side of the path．

A．to have rested

B．resting

C．to rest

D．rest

He will have to ________ this foolish behaviour．

A．pay out

B．pay off

C．pay back

D．pay for

He was late for the meeting ________ the heavy snow．

A．as a result

B．because

C．as a result of

D．in the result

Alice worked on an important document till very late last night．________, she got up very late this morning．

A．Because

B．In fact

C．As a result

D．Though