. I have no idea _______ he left the party without _______ .
| A．why; noticing | B．how; being noticed |
| C．whether; notices | D．that; notice |
---You know Jane?
---Yes, it was _____ I surfed the Internet last week.
| A．that | B．when | C．why | D．whom |
---I’m wondering why the visitors chose to stay with the host family.
--______ real local life.
| A．Experiencing | B．Experience |
| C．To experience | D．Having experienced |
---How'syour project work going, Jack?
---______. I'm half finished with it.
| A．So far so good | B．It's up to you | C．Never mind | D．Forget it |
It’s better to go shopping in the supermarket than ____ home for chat.
| A．staying | B．to stay | C．stay | D．stayed |
I think that’s the only way we can think of ______ the math problem.
| A．solve | B．solves | C．to solve | D．solving |