I forgot to add a sentence at the beginning. I don't think the verb trust is correct.

Question

When Johnny moved to New York. Claire wondered how they could trust each other.

By the way, can you recommend a site where I can find entry tests for students at a pre-intermediate/intermediate level of English?

Answer 1

The verb "trust" is fine in that sentence.

http://www.englishjet.com/english_courses_files/test_pre-intermediate.asp

(Broken Link Removed)

http://www.englishtag.com/tests/level_test_pre_intermediate_A2.asp

http://www.embassyces.com/about/levels_of_english.aspx

http://www.mitsuba.co.uk/english/test.html