They _________ laughing when they heard his funny voice.
| A．burst out | B．fell about | C．felt about | D．burst into |
I felt very tired when I got home, and I __________ straight to bed.
| A．go | B．went |
| C．had gone | D．have gone |
—What about your self-drive trip yesterday?
—Tiring! The road is being widened, and we __________ a rough ride.
| A．had | B．have |
| C．would have | D．have had |
After completing and signing it, please return the form to us in the envelope __________.
| A．providing | B．provided |
| C．having provided | D．provide |
The witnesses __________ by the police just now gave very different descriptions of the fight.
| A．questioned | B．being questioned |
| C．to be questioned | D．having questioned |
In some languages, 100 words make up half of all words __________ in daily conversations.
| A．using | B．to use |
| C．having used | D．used |