连词成句。 1. know, I, don't (.) ____________________________________________________ 2. in, when, you, arrive, China, do (?) ____________________________________________________ 3. Mrs. Smith, please, to, talk (.) ____________________________________________________ 4. for, you, when, leave, Beijing, do (?) ____________________________________________________ 5. may, go, Canada, I, to (?) ____________________________________________________ 6. say, these, numbers, you, can, car (?) ____________________________________________________