-Hello Jenny, can I see Ms. Lewis?
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--- Was it by cutting down unnecessary expenditure ______ Mr. Simon saved the firm?
--- No, it was by improving work efficiency.
| A．when | B．what | C．how | D．that |
The house, ______ door often stays open until late at night, works as a home for the guards, some of ______ are from the countryside.
| A．whose; whom | B．which; whom |
| C．whose; them | D．where; them |
---What have you learned from your experience in the USA?
---Well, meeting people from another culture ______ be very difficult.
| A．must | B．can |
| C．should | D．shall |
. ---Have you seen ____ iphone? I left it on the desk this morning.
---Is it ____ white one? I think I saw it somewhere.
| A．an; the | B．the; the |
| C．an; a | D．the; a |
It is a ________，but is a chance as well.
| A．task | B．question | C．challenge | D．work |