Jenny hopes that MrSmith will suggest a good way to have her written English in a short period [ ]

People can unlock the shared bikes, _________are equipped with GPS and can be left anywhere in public, by simply _________their smart phones.

My parents as well as my sister _________playing table tennis .

ne should learn something about first aid, because every second ________ in an emergency.

Mother was ill, _____ Father cooked for us instead.