Mobile Apps Grammar

While Nokia ___ (launch) the first mobile app store, Apple ___ (introduce) the App Store.

• • was launching, introduced

• • launched, was introducing

• • was launching, was introducing

In 2008, developers ___ (work) on creating new apps while users ___ (download) them from the store.

• • worked, were downloading

• • were working, were downloading

• • were working, downloaded

The mobile app industry ___ (begin) to grow rapidly after smartphones ___ (become) more common.

• • began, were becoming

• • was beginning, were becoming

• • began, became

When Google Play ___ (open) in 2012, users ___ (already use) many Android apps.

• • aopened, were already using

• • was opening, already used

• • opened, were already used

As smartphones ___ (evolve), the demand for mobile apps ___ (increase).

• • evolved, was increasing

• • were evolving, was increasing

• • were evolving, increased

As the demand for mobile gaming ___ (rise), developers ___ (create) more engaging apps.

• • rose, were creating

• • was rising, created

• • was rising, were creating

When Facebook ___ (acquire) Instagram, the social media landscape ___ (change) significantly.

• • acquired, changed

• • was acquiring, was changing

• • was acquiring, changed

While many users ___ (prefer) native apps, others ___ (opt) for web-based solutions.

• • preferred, were opting

• • were preferring, opted

• • were preferring, were opting

As mobile technology ___ (advance), new opportunities for app development ___ (emerge).

• • advanced, emerged

• • was advancing, were emerging

• • were advancing, emerged

When the first mobile payment system ___ (launch), consumers ___ (become) more comfortable with digital transactions.

• • launched, became

• • was launching, were becoming

• • was launching, became