a) /credentials (n.) /, /b) trials (n.) /, /c) to boast (v.) /, /d) densely (adv.) /, /e) plain sailing (n.) /, /f) congestion (n.) /, /g) bursting at the seams (v.) ___ /, /h) refining (v.) /, / i) Lift out (n.) /, / j) lift …. out (v.) /, / k) to tighten (v.) /
1) Lift out the lamp housing and place it on a soft surface to avoid scratching the lens.
2) The government moved to tighten the rules on toxic substances in the air.
3) Because of the number of vehicles on the roads, the traffic in most big cities in the Middle East is causing congestion at every major artery.
4) The engineers spent months refining the software.
5) After we solved that problem the rest was plain sailing.
6) The Democratic Republic of the Congo is one of the most densely populated countries in Africa.
7) He liked to boast that he was the richest man in town.
8) Britain's new ambassador has presented his credentials to the President.
9) Shock and thaw? Earth’s oldest asteroid impact may have helped lift the planet out of a deep freeze.
10) They have been treated with this drug in clinical trials.
11) They have a lot of children now, so their little house is bursting at the seams.
