（ ）1．---- How do you study ______ a test?
---- I study ______ working with a group.
A: for by B: by in C: for from
（ ）2．My sister said she studied by ________ English-language videos.
A: watch B: watching C: watched
（ ）3．What about _______ the textbook? A: reading B: read C: to read
（ ）4．It improves my ______ skills A: spoken B: speak C: speaking
（ ）5．I have trouble _______ the new words.
A: memorize B: memorizing C: to memorize
