18．_________a US visitor visa twice, the old couple finally gave up their hope of going to America to experience Thanksgiving Day.
| A．Having been refused | B．Being refused | C．Having refused | D．To be refused |
Because the scientists are always traveling towards the truth _________ arriving at them, they need to help one another to find the way.
| A．more than | B．bless than | C．other than | D．rather than |
_________ scientist like her won’t be simply satisfied with _________ little progress that has been made.
| A．The, a | B．The, / | C．A, / | D．A, the |
___________ from the top of the hill, the town looks like a diamond.
| A．Having seen | B．Seeing | C．To see | D．Seen |
— Do you know Laura’s address?
— _____________. As a matter of fact, I don’t know any Laura, either.
| A．I think so | B．I’m afraid not | C．I hope so | D．I’d rather not |
Would it __________ for the school to have summer camp for all of us?
| A．break away | B．leave out | C．make sense | D．put forward |