It may be necessary to stop ________ in the learning process and go back to the difficult points in the lessons.

A) terminal B) benefit C) fate D) estimate

A) furnish B) propose C) raise D) present

A) transformed B) transported C) transferred D) transmitted

A) acquire B) inquire C) request D) require

A) put off B) hold back C) put aside D) hold up

A) on B) for C) in D) with

A) exposure B) extension C) exhibition D) expansion

A) seriously B) heavily C) badly D) severely

A) but that B) for that C) and that D) in that

A) question B) stuff C) matter D) issue