We _______ the lessons for half a year．We are sure we can make it．（ ）
A．reviewB．reviewed
C．have reviewedD．are reviewing
In February， Chinese tech company Huawei _____Mate X， a foldable（可折叠的）5G mobile phone．（ ）
A．is introducingB．introduced
C．introducesD．was introduced
Where is Catherine？ I haven't seen her for days．
She Wuhan． She'll be back next week．（ ）
A．has gone toB．has been to
C．have gone toD．have been to
My brother with other nine firefighters ______ hard every day in order to help people in need at any time．（ ）
A．practicesB．practiceC．practiced
Where is your father, David？ I need his help．
He ______ work．（ ）
A．has been toB．has gone to
C．has been in
Mary, I remember you several years ago．
Yes, I for 3 years．（ ）
A．married, have married
B．married, married
C．married, have been married
D．have married, have been married
John _______ so hard on his project that he didn't notice his mom enter the room．（ ）
A．worksB．has worked
C．was workingD．will work
We are not allowed to laugh when we_____．（ ）
A．ateB．have eatenC．are eating
As long as the whole of our society _____ trying， we will make our skies blue again． （ ）
A．keepsB．will keepC．kept
Slow down! Someone ________ the road．
Easy． I will．（ ）
A．has crossedB．was crossing
C．is crossing
I _____ some washing when you called me last night．（ ）
A．was doingB．am doingC．were doing
Where do you live， Lin Tao？
I live in Beijing now． I _____here for ten years．（ ）
A．movedB．have movedC．have been
What is Bill doing right now？
He _____soccer． He _____soccer every Saturday．（ ）
A．play； playsB．plays； is playing
C．is playing； plays
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