In order not to be disturbed, I spend three days _______ in my study.
| A．locking | B．locked | C．to lock | D．lock |
Running a company is not ______ a matter of hiring people — they also need to be trained.
| A．simply | B．partly | C．seriously | D．equally |
Everything was perfect for the picnic ______ the weather.
| A．in place of | B．as well as | C．except for | D．in case of |
Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.
| A．sense | B．view | C．means | D．idea |
American Indian ______ about five percent of the U.S. population.
| A．fill up | B．bring up | C．make up | D．set up |