-- What is Mr. white, do you know? -- I don't know exactly. But I think he can be but a doctor.
___in a heavy snow, the couple had to walk home, leaving their car behind.
Only when we are abroad ____feel how important English is.
It is in the Future Mall where you bought a coat ____ her sister works.
He has known the truth. Therefore, there is no ____ to keep it a secret
I lost my wallet last week, but ____ it didn’t contain much money at that time.