The doctor saw _________ that the child had measles, so he prescribed him some medicine at once.
A.at a time B.at a glance C.at a stroke D.at a sitting正确答案B
The doctor saw _________ that the child had measles, so he prescribed him some medicine at once.
A.at a time B.at a glance C.at a stroke D.at a sitting正确答案B
