We can't travel around as we used to ________ the pandemic (疫情) is over.
A.because B.so C.unless D.if
—Do you know if there ________ a library five years ago?
—Yes. But it is a museum now.
A.is B.was C.are D.am
Sweden is ________ European country, which borders Norway to the west.
A.a B.an C.the D./
We can't read ________ in morning classes because we all wear medical masks.
It is so exciting that I've got my first driving ________ I can drive now!
As soon as someone ________ at the door, Tom rushed to open it. He though this teacher arrived.
