If you have any problems during your study here,please do not _______ to call me for help
A、hesitateA
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Afterworkingfortwentyhourswithoutanyrest,thedoctorswere_______.
Bothsugarandsaltcan______inwater.
Freemedicalserviceis_______tonearlyallthecollegestudentsinChina.
Thisriverformsanatural_______betweenChinaandKorea.
Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.
