We must ______ that the experiment is controlled as rigidly as possible.
A、assureA
暂无解析
________ so many people in the United States been out of work as today.
Senior members of the staff competed eagerly ________ the position of sales manager in the company.
Shehadclearlyno________ofdoinganywork,althoughshewasverywellpaid.
The engine has broken and the boat is ______ on the water.
Forthenewcountrytosurvive,________foritspeopletoenjoyprosperity,neweconomicpolicieswillberequired.
