proofreading 1.our company do a lot of business with the US 2.We went to paris last sumer. 3.Kim went into his room and shutted the door.?

Error and correction:-
(1)Our company do a lot of business with the US.-----(do)---use for plural subject.
(2)We went to Paris last summer.----Paris----spelling for summer---in countries outside the tropics is the warmest seasons of the year.
(3)Kim went into his room and (shut) the door.---shut vt,vt where pt.,pp., shut ; shut.)