I wasn’t aware of this before, but recent research _____ that eating too much fat can contribute to heart disease.
A．has shown　B．will showC．was showingD．showed
A
本題考查時(shí)態(tài)。根據(jù)句意：我以前沒(méi)有意識(shí)到這一點(diǎn)，但最近的研究已經(jīng)表明：吃太多的脂肪可能導(dǎo)致心臟病。recent research故用現(xiàn)在完成時(shí)態(tài)。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

.--- I was lucky the win a gold medal in the800-metre race.
--- You  ____ through hard training.
A．must goB．should goC．must have goneD．should have gone.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

— Mom, where is my lunch pack?
— Just where it _____.
A．has beenB．had beenC．wasD．be

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Though ______ to see us，the professor gave us a warm welcome。
　　A.  surprise  B was surprised  C.  surprised  D. being surprised

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

-Sorry for keeping you waiting.
-Never mind. I________ here only a few minutes.
A．cameB．comeC．wasD．have been

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

The first decade in the 21st century _______ the rapid rise of China as a world economic power.
A．witnessB．has witnessedC．will witness D．have witnessed

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Jane’s parents suggested that she ______ a medical examination.
A．hasB．haveC．hadD．have has

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Are you still here?You were here half an hour ago. Who        for?
A．were you waiting B．did you wait
C．a(chǎn)re you waitingD．do you wait

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

It was the first time in two years that I________ my youngest son face to face.
A．have seenB．had seenC．sawD．see

查看答案和解析>>

同步練習(xí)冊(cè)答案