---Isn’t it a surprise that I happened to meet Francis Mathews at the Christmas Party last week?
---If my memory serves me correctly, you _____ each other for exactly two years.
| A．hadn’t seen | B．haven’t seen | C．didn’t see | D．don’t see |
—How are your recent trip to Sichuan?
—I’ve never hadone before.
| A．a pleasant | B．a more pleasant | C．a most pleasant | D．the most pleasant |
Passengers are permittedonly one piece of hand luggage onto the plane.
| A．to carry | B．carrying | C．to be carried | D．being carried |
Helping others is a habit,you can learn even at an early age.
| A．it | B．that | C．what | D．one |
The country has already sent up three unmanned spacecraft , the most recentat the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
He knew the files could be of help to took over the job.
| A．anyone | B．someone | C．whoever | D．who |