" Put on your coat，______you will catch a cold! "This is what my mum often says to me．（ ）
A．andB．butC．orD．so
Seeing the new changes in her hometown， Nanjing， Sandy could ______believe her eyes．（ ）
A．properlyB．highlyC．nearlyD．hardly
Last month the students in Changjiang Road Primary School held the"Ten Years of Growth Ceremony" to celebrate _____10th birthday together．（ ）
A．theyB．theirC．themD．theirs
Xinhua Zidian，or the New Chinese Dictionary， was first published ______1953．（ ）
A．onB．inC．atD．for
Wendy，how long have you had the Huawei P30 Pro？
A couple of days． I ______ it last week．（ ）
A．boughtB．buy
C．will buyD．have bought