Not being able to speak English,they felt rather（）in the USA.

单项选择题We advised them to take a rest, but they （）on finishing the work.

A.insisted
B.persisted
C.existed
D.resized

单项选择题The（）into the fire accident was carried out by two policemen.

A.question
B.doubt
C.investigation
D.information

单项选择题Tom succeeded in getting a（）of $3,000 from the bank to buy a new house.

A.debt
B.found
C.loan
D.payment

单项选择题He was asked to speak louder（）all the students in the classroom could hear him.

A.as
B.so as to
C.so that
D.than

单项选择题It（）exactly thirty years since I graduated from college.

A.was
B.has been
C.was be
D.had been