We'd better speed up if we want to get there in time.
A. slow down B. turn down C. put down D. lie down

A chronic lack of sleep may make us irritable and reduces our motivation to work.
A. uncomfortable B. responsive C. calm D. miserable

We are now a 24/7 society where shops and services must be available all hours.
A. an active society B. an inactive society
C. a physical society D. a working society

His replies were inconsistent with his previous testimony.
A. contradicted B. compatible C. enhanced D. incorporated

Solar energy is not only plentiful but also infinite.
A. without limit B. boundless C. limited D. indefinite

In remote communities, it's important to replenish stocks before the winter sets in.
A. empty B. refill C. repeat D. remake

There has been no discernible improvement in the noise levels since lorries were banned.
A. insignificant B. clear C. obvious D. thin

My cousin tends to look on the bright side in any circumstance.
A. be optimistic B. be pessimistic C. be confident D. be smart

It was apparent from her face that she was really upset.
A. obvious B. indistinct C. transparent D. evident

In some countries, the disease burden could be prevented through environmental improvements.
A. something to stiffer B. something enjoyable
C. something sad D. something to entertain