——I think the book is as interesting as it is instructive.—— It could never be____.It is well worth reading.
It was already past midnight and only three young men ________ in the tea house.
On hearing the news of the accident in the coal mine,she ________ pale.
The effect of the medicine on this kind of disease remains ________.
The card reads:“Dear Mom and Dad,they are ________ everyone write home.Love,Joey.”
With modern equipment,many mysteries have ________ to light in recent years.