A snake in the grass

he was <u><em>in a brown study</em></u> and did not seem to catch my point.

The staff have felt <u><em>on edge</em></u> ever since they heard the rumour about retrenchment.

Tall order

Shweta might <u><em>scream blue murder</em></u>, but I feel Ritu should get the promotion since …

I <u><em>ran out</em></u> of money on my European tour.

He visits the doctor <u><em>off and on</em></u>.

To be in two minds

To drive home