English Grammar Fill-in-the-Blank
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4. About 2% of cerebral palsy cases are believed ---- due to an inherited genetic cause, and the potential treatments ---- these days include stem cell therapy. A) to be / being examined B) to have been / examining C) being / to be examined D) having been / to examine E) to being / having examined
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Hi Furkan, let's solve this together. We need to fill in the blanks in this sentence using the correct grammatical structures.
Analyzing the Sentence
Let's look at the first part of the sentence: About 2% of cerebral palsy cases are believed blank due to an inherited genetic cause.
The structure 'are believed' is a passive reporting verb. After these, we generally use an infinitive. So, 'are believed to be' is the correct formation here to describe a present state.
Now, look at the second part: The potential treatments blank these days include stem cell therapy.
Here, we need a reduced relative clause describing the treatments. The full version would be 'treatments which are being examined'.
Reducing this, we keep the passive participle: 'treatments being examined'.
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