Someone called me up in the middle of the night, but he hung up ______ I could answer the phone.
| A．if | B．since | C．until | D．before |
The hall is too noisy. The speaker has to raise his voice to make himself _____.
A.hear B.heard C. hearing
The engineer will return from Hong Kong _____ a few days.
A.in B.for C.after
_____, I practice speaking English in the park. The air there is very fresh.
A.SometimeB.Some timesC.At times
The winter holiday will begin soon. John _____ to stay with us.
A.will be coming B.comes C.is coming
Maria has _____ trouble _____ math, so she often asks her math teacher for help.
A.much, understanding
B.many, understanding
C.not, to understand