should we ______ sewage plants because they are not absolutely perfectly clean?

stop smoking and you will see a/ an ______ improvement in your health.

the others had complained that sarah wasn't _______ her weight.

investors have ________ a 14% profit in just 3 months.

formal, written communication needs to be clear and to the point, without spelling or grammar ________, and in a formal register.

scientists can also ____ a role in improving energy efficiency in their laboratories.

i could sit here and argue with you till the ______ come home, but it wouldn't solve anything.

she'd been seeing the boy for a while, but didn't want her parents to __________.

i've never _______ to anyone like i do to you.

years of doing meticulous research had made her very ________ in her working methods.

people often behave irrationally when they are _______ stress.