--- Hi, Tracy, you look tired.
--- I’m very tired. I ____ the living room all day.
| A．painted | B．had painted | C．am painting | D．have been painting |
Explorer Robert Ballard searched the sunken ship---the Titanic for more than 20 years and also, with his cameras, he _____ the hole along the side of the ship which had caused it to fill with water and sink.
| A．could find | B．managed finding |
| C．succeeded to find | D．was able to find |
My friend Tom stays at Internet bars above 8 hours every day ______, really a netter(网虫).
| A．on average | B．in charge | C．up close | D．for free |
I have many friends, _____ some are businessman.
| A．of them | B．from which | C．who of | D．of whom |
____ is certain, though, is that the mystery of Tutankhamun’s tomb has never been fully explained.
| A．It | B．What | C．This | D．As |
Some time after the rockets and the space shuttle are _____, the rocket will _____ the space shuttle and ____ the sea.
| A．set sail; broadcast; drop in | B．ruled out; orbit; show up |
| C．stepped up; survive; fall for | D．launched; separate from; fall into |