The dead rate is _____ pigs and recovery usually ______ within 7-10 days. A low in; occurs B. rich in;happens C. high in; came about D. poor in;took place
-----My room gets very cold at night. -----_________________.
At the end of the meeting, it was announced that an agreement ________.
----She looks happy. She _______ have passed the exam. -----I guess so. It is not difficult after all.
Choosing the right dictionary depends on ______ you want to use it for.
More than a dozen students in that school _______ abroad to study medicine last year.