The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
| A．to be invented | B．having been invented |
| C．invented | D．to have been invented |
In peace, too , the Red Cross is expected to send help _________there is human suffering.
| A．whoever | B．however | C．whatever | D．wherever |
We won’t keep winning games ________ we keep playing well.
| A．because | B．unless | C．when | D．while |
I’m certain David’s told you his business troubles. _________, it’s no secret that he owes a lot of money to the bank.
| A．However | B．Anyway | C．Therefore | D．Though |
John received an invitation to dinner, and with his work ____, he gladly accepted it.
| A．finished | B．finishing | C．having finished | D．was finished |
The opening province which _________ thirteen counties and three coastal cities will quicken its paces of economic development.
| A．consists of | B．makes up | C．is included | D．is contained |