The question that puzzles them is ___they can finish the work on time.
| A．what it is that | B．what is it that | C．how is it that | D．how it is that |
In order to learn the _______ of the family business, Bill took a job as messenger boy in one of the offices.
| A．ins and outs | B．dos and don’ts | C．heads and tails | D．t’s and i’s |
Electricity, like other forms of ______, has greatly increased in price in recent years.
| A．pressure | B．force | C．strength | D．energy |
—Hello, I’d like to speak to Henry.
—Oh, which _______? There are two ______ in our office.
| A．Henrys, Henrys | B．Henries, Henries | C．Henry, Henrys | D．Henrys, Henries |
Jim was late for two classes this morning. He said that he forgot both of the ______.
| A．rooms number | B．room number | C．room’s numbers | D．room numbers |
—How can I use this washing machine?
—Well, just refer to the _______.
| A．explanations | B．expressions | C．introductions | D．directions |