________ you understand the rule, you will have no further difficulty.

A. ought to come B. mostly

C. almost D. possibly

A. nearly B. mostly

C. almost D. possibly

A. the; a B. the; the

C. a; the D. a; a

A. the; a B. the; the

C. a; the D. a; a

A. Gate 21 B. 21St Gate

C. the Gate 21 D. 21 Gate

A. them to watch

B. that they watch

C. their watching

D. watching

A. used to B. am used to it

C. sued D. used to do

A. as B. while

C. the D. the more

A. ought to avoid

B. could have been avoided

C. should have avoided

D. might have avoided

A. on B. with

C. at D. in