– Will teachers _____ by computers in the future, Tony?
–Maybe yes, maybe no. But I’m sure we’ll learn from both of them.
| A．have replaced | B．are replacing |
| C．are replaced | D．be replaced |
---How long have you been running ? ---Since ______ .
| A．two hours | B．two hours ago | C．I am ten years old | D．for two hours |
He said he_____ to my home in a week.
| A．would come | B．came | C．comes | D．will come |
Sally has been swimming ______ four hours.
| A．for about | B．since | C．about | D．/ |
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
| A．collected | B．had collected |
| C．has been collecting | D．had been collecting |
I had a really hard time _____studying science this term.
| A．to | B．with | C．in | D．on |