— _________, this math problem seemed quite simple to me, but when I tried to work it out, I just couldn’t.
— There are always things like this, I think.
| A．On one hand | B．In my opinion | C．At first sight | D．On its own |
The sunlight came in ________the windows in the roof and lit up the whole room.
| A．through | B．across | C．on | D．over |
________you have seen both fighters,________will win?
| A．Since;do you think who | B．As;who you think |
| C．When;whoever | D．Since;who do you think |
Someone called me up in the middle of the night,but they hung up ________I could answer the phone.
| A．as | B．since | C．before | D．until |
We offered him our congratulations ________his passing the college entrance exams.
| A．at | B．on | C．for | D．of |
The doctor will be free ________.
| A．10 minutes later | B．after 10 minutes |
| C．in 10 minutes | D．10 minutes after |