Explanation: Earwigs make up the insect order Dermaptera. With about 2,000 species in 12 families, they are one of the smaller insect orders. Wikipedia
B. All square
C. All oblong
D. All conical
B. Dental gloss
C. Dental floss
D. Dental dross
Explanation: Dental floss a soft thread of floss silk or similar material used to clean between the teeth.
Explanation: Swivel: turn around a point or axis or on a swivel.
B. Sloane Street
C. Harley Street
D. Downing Street
Explanation: 10 Downing Street, colloquially known in the United Kingdom as Number 10, is the headquarters of the Government of the United Kingdom and the official residence and office of the First Lord of the Treasury, a post which, for much of the 18th and 19th centuries and invariably since 1905, has been held by the Prime mininster
Explanation: Proverb: Rome wasn't built in a day